Secure Through Door Key Drop Box with Combination Lock Heavy Duty Steel Mailbox

Keep important deliveries protected and accessible without handing over a physical key. This through the door key drop box provides secure storage for mail, keys, smartphones, envelopes, and small parcels at homes, offices, schools, and workplaces. Built from heavy-duty steel, this locking mailbox combines a rust-resistant powder-coated finish with a rainproof delivery flap and drainage design. A changeable combination lock and internal anti-fishing baffles add dependable protection while the viewing window lets you check contents at a glance.

Key Features

• Large 12 x 6.1 x 14.1 in storage box with a 1.9 x 10.2 in delivery slot.
• Heavy-duty steel construction with rust-resistant and scratch-resistant coating.
• Combination lock box design eliminates the need to manage access keys.
• Rainproof flap, drainage holes, rubber pads, viewing window, and anti-fishing baffles help protect stored items.
• Designed for doors up to 1.7 in thick with straightforward installation.

Why Choose Our Secure Through Door Key Drop Box
Unlike basic open mail slots or lightweight boxes, this mail drop box combines durable steel construction, weather protection, controlled combination access, and anti-theft barriers in one practical design. Its spacious capacity handles more than standard letters while allowing convenient deposits without opening the door.

Perfect For
Ideal for homes, offices, rental properties, schools, reception areas, workshops, and businesses that need a secure key drop box. Use it for after-hours key returns, documents, envelopes, smartphones, payments, and small parcel deposits.

Protect Important Drops With Confidence
Make everyday deliveries and key returns simpler while keeping important items protected. Add this secure through-door drop box to your property for convenient dependable access.